Rainy season

Thailand: when is the rainy season?

The rainy season lasts from May to October, the dry season from January to February. Best time to travel, dry and with good holiday weather: January – February.

Precipitation by destination

Ao Nang, Krabi
Rainy: from May to November
1. 62
2. 49
3. 109
4. 200
5. 280
6. 258
7. 266
8. 272
9. 315
10. 357
11. 273
12. 131
Bangkok
Rainy: from May to October
1. 14
2. 19
3. 41
4. 75
5. 140
6. 121
7. 137
8. 137
9. 246
10. 187
11. 54
12. 10
Chiang Mai
Rainy: from June to October
1. 7
2. 4
3. 11
4. 28
5. 104
6. 112
7. 176
8. 223
9. 230
10. 125
11. 26
12. 7
Hua Hin
Rainy: from May to October
1. 17
2. 16
3. 49
4. 69
5. 129
6. 103
7. 140
8. 133
9. 186
10. 197
11. 61
12. 13
Khao Lak
Rainy: from May to October
1. 64
2. 50
3. 109
4. 168
5. 259
6. 246
7. 242
8. 246
9. 297
10. 329
11. 234
12. 109
Ko Pha-ngan
Rainy: from October to November
1. 69
2. 41
3. 80
4. 107
5. 156
6. 120
7. 117
8. 120
9. 177
10. 308
11. 297
12. 146
Koh Lanta
Rainy: from May to November
1. 49
2. 31
3. 87
4. 166
5. 259
6. 236
7. 246
8. 261
9. 300
10. 339
11. 258
12. 119
Koh Samui
Rainy: from October to November
1. 68
2. 38
3. 77
4. 109
5. 143
6. 112
7. 117
8. 124
9. 173
10. 288
11. 298
12. 165
Koh Tao
Rainy: from October to November
1. 66
2. 38
3. 77
4. 102
5. 160
6. 121
7. 121
8. 118
9. 168
10. 296
11. 270
12. 134
Patong, Phuket
Rainy: from May to October
1. 64
2. 50
3. 109
4. 168
5. 259
6. 246
7. 242
8. 246
9. 297
10. 329
11. 234
12. 109
Pattaya
Rainy: in May and from September to October
1. 23
2. 23
3. 45
4. 63
5. 125
6. 98
7. 105
8. 100
9. 190
10. 223
11. 65
12. 14
Phuket
Rainy: from May to October
1. 64
2. 50
3. 109
4. 168
5. 259
6. 246
7. 242
8. 246
9. 297
10. 329
11. 234
12. 109

Long-term precipitation per month, mm. Rainy months: well above the place's own average (at least 100 mm); dry months: half the average or less, or under 60 mm.

Thailand: rainy season, quick answers

Thailand: when is the rainy season?

The rainy season lasts from May to October. On average, 276 mm fall in October, the wettest month.

Thailand: when is the dry season?

The driest months are January – February, with 34 mm on average in February.

Thailand: when is the best time to avoid the rain?

January – February: dry months with good holiday weather at most destinations.

Thailand: weather & best time to visit Rainy season: when is the dry season?

Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences